If your dock floats with your boat then just make everything off snug. Longer leads (spring lines for example) should be tighter than short leads. (a breast line, for example) Make sure you got good fenders or fenderboards.
If your lines are chafing then use chafing gear. A very good cost effective method of rigging
chafing gear on a small boat mooring
line is to cut a sufficient length of 1-1/2" fire hose, the regular rubber-inside canvas
kind, and slip it on over your line before you splice the eye. You can have a piece protecting the eye itself as well as a couple of pieces that slide up and down the line and protect chafe prone areas in the body of the line. Spot your chafing gear and secure it with small stuff passed through the line or with good old duct tape. The fire hose is extremely resistant to chafe. Ships and tugs and other commercial
vessels toss this stuff all the time so dumpster diving
could get you some. Also try your local fire station, though many fire departments have gone to that plastic stuff and no longer use canvas
. For bigger lines get 2-1/2" fire hose.
I wish I had a floating dock. You are fortunate.